基于威布尔分布函数的金银花气调干燥实验研究  

Study on Modified Atmosphere Drying of Flos lonicerae Based on Weibull Distribution Function

作　　者：刘云宏[1] 苗帅[1] 罗磊[1] 吴建业[1] 种翠娟[1] 张玉先[1] 关随霞[1] 

机构地区：[1]河南科技大学食品与生物工程学院,河南洛阳471003

出　　处：《食品科学》2014年第21期31-35,共5页Food Science

基　　金：国家自然科学基金-河南人才培养联合基金项目(U1404334);国家自然科学基金面上项目(31171723);河南省教育厅科技技术研究重点项目(12A210005;14B550005)

摘　　要：以金银花为研究对象,进行充入氮气调节氧气体积分数的气调干燥实验研究。结果表明:提高干燥温度可显著缩短干燥时间,降低氧气体积分数可略微缩短干燥时间;采用威布尔分布函数拟合干燥曲线,决定系数R2、平均误差MBE及均方根误差RMSE的区间分别为0.992 5~0.999 6、0.001 3~0.007 4及0.003 8~0.017 5,其尺度参数随温度的升高而显著降低,随氧气体积分数的升高而略微增大,而形状参数稍大于1;水分扩散系数随温度的提高及氧气体积分数的降低而增大,绿原酸含量随着氧气体积分数及干燥温度的下降而升高。因此,威布尔函数能很好地描述金银花气调干燥的水分比动力学,气调干燥可有效提高金银花的产品品质。Modified atmosphere drying of Flos lonicerae was conducted. Nitrogen gas was flushed into the dryer to adjust oxygen content. The results showed that the increase in drying temperature and the decrease in oxygen content could shorten the drying time. Drying curves were fitted based on Weibull distribution function. The ranges of coefficient of determination, mean bias error and root mean square error were 0.992 5–0.999 6, 0.001 3–0.007 4 and 0.003 8–0.017 5, respectively. The scale parameter decreased obviously with increasing drying temperature but decreased slightly with decreasing oxygen content. The shape parameter was slightly over 1. Moisture diffusive coefficient increased with an increase in drying temperature and a decrease in oxygen content, and chlorogenic acid content increased with a decreases in drying temperature and oxygen content. Therefore, the Weibull distribution function could simulate the moisture ratio kinetics of the modified atmosphere drying of Flos lonicerae with high fitting precision and the modified atmosphere drying method could improve the quality of Flos linicerae significantly.

关 键 词：气调干燥 金银花 威布尔函数 

分 类 号：TQ461[化学工程—制药化工]